{{Cite conference| publisher = BRGM - Service géologique national| last1 = Le Berre| first1 = Patrick| last2 = Thomas| first2 = Éric| last3 = Schroetter| first3 = Jean-Michel| last4 = Cocherie| first4 = Alain| last5 = Carn-Dheilly| first5 = Anne| last6 = Mougin| first6 = Bruno| last7 = Teygey| first7 = M.| last8 = Foucaud-Lemercier| first8 = Blandine| last9 = Rivière| first9 = Jean-Marie| last10 = Gautier| first10 = Maurice| last11 = Vivet| first11 = Jean-Bernard| title = Notice explicative de la feuille 352 - Guer| location = Orléans| series = Carte Géol. France (1/50 000)| date = 2009}}